68/170 = 40%
A fraction like 68/170, or 40%, can show up in everyday situations such as test scores, survey results, or the amount of a group that chooses a certain option. For example, if 68 out of 170 students prefer taking the bus, that means 40% of the students have that preference.
You can picture 40% as four out of every ten parts, or a little less than half of something. It is also easy to estimate by thinking of half as 50% and noticing that 40% is 10 percentage points below half.
A common mistake is confusing 40% with 40 percentage points or with 0.40%—they are not the same. The fraction 68/170 represents 40 out of every 100, while 0.40% would represent a much smaller amount.
